spring-cloud/spring-cloud-openfeign

//// DO NOT EDIT THIS FILE. IT WAS GENERATED. Manual changes to this file will be lost when it is generated again. Edit the files in the src/main/asciidoc/ directory instead. ////

image::https://github.com/spring-cloud/spring-cloud-openfeign/actions/workflows/maven.yml/badge.svg?branch=main&style=svg[https://github.com/spring-cloud/spring-cloud-openfeign/actions/workflows/maven.yml/badge.svg?branch=main&style=svg[https://github.com/spring-cloud/spring-cloud-openfeign/workflows/Build/badge.svg?branch=main&style=svg]["Build",link="https://github.com/spring-cloud/spring-cloud-openfeign/actions"]

WARNING: As announced in https://spring.io/blog/2022/12/16/spring-cloud-2022-0-0-codename-kilburn-has-been-released#spring-cloud-openfeign-feature-complete-announcement[Spring Cloud 2022.0.0 release blog entry], we're now treating the Spring Cloud OpenFeign project as feature-complete. We are only going to be adding bugfixes and possibly merging some small community feature PRs. We suggest migrating over to https://docs.spring.io/spring-framework/reference/integration/rest-clients.html#rest-http-service-client[Spring HTTP Service Clients] instead.

[[features]] == Features

• Declarative REST Client: Feign creates a dynamic implementation of an interface decorated with JAX-RS or Spring MVC annotations

[[building]] == Building

:jdkversion: 17

[[basic-compile-and-test]] == Basic Compile and Test

To build the source you will need to install JDK {jdkversion}.

Spring Cloud uses Maven for most build-related activities, and you should be able to get off the ground quite quickly by cloning the project you are interested in and typing

$ ./mvnw install

NOTE: You can also install Maven (>=3.3.3) yourself and run the mvn command in place of ./mvnw in the examples below. If you do that you also might need to add -P spring if your local Maven settings do not contain repository declarations for spring pre-release artifacts.

NOTE: Be aware that you might need to increase the amount of memory available to Maven by setting a MAVEN_OPTS environment variable with a value like -Xmx512m -XX:MaxPermSize=128m. We try to cover this in the .mvn configuration, so if you find you have to do it to make a build succeed, please raise a ticket to get the settings added to source control.

The projects that require middleware (i.e. Redis) for testing generally require that a local instance of https://www.docker.com/get-started[Docker] is installed and running.

[[documentation]] == Documentation

The spring-cloud-build module has a "docs" profile, and if you switch that on it will try to build asciidoc sources using https://docs.antora.org/antora/latest/[Antora] from modules/ROOT/.

As part of that process it will look for a docs/src/main/asciidoc/README.adoc and process it by loading all the includes, but not parsing or rendering it, just copying it to ${main.basedir} (defaults to $\{basedir}, i.e. the root of the project). If there are any changes in the README it will then show up after a Maven build as a modified file in the correct place. Just commit it and push the change.

You can generate the docs site using the following command:

[indent=0]

./mvnw -pl docs -P docs antora:antora

[[working-with-the-code]] == Working with the code If you don't have an IDE preference we would recommend that you use https://spring.io/tools[Spring Tools Suite] or https://eclipse.org[Eclipse] when working with the code. We use the https://eclipse.org/m2e/[m2eclipse] eclipse plugin for maven support. Other IDEs and tools should also work without issue as long as they use Maven 3.3.3 or better.

[[activate-the-spring-maven-profile]] === Activate the Spring Maven profile Spring Cloud projects require the 'spring' Maven profile to be activated to resolve the spring milestone and snapshot repositories. Use your preferred IDE to set this profile to be active, or you may experience build errors.

[[importing-into-eclipse-with-m2eclipse]] === Importing into eclipse with m2eclipse We recommend the https://eclipse.org/m2e/[m2eclipse] eclipse plugin when working with eclipse. If you don't already have m2eclipse installed it is available from the "eclipse marketplace".

NOTE: Older versions of m2e do not support Maven 3.3, so once the projects are imported into Eclipse you will also need to tell m2eclipse to use the right profile for the projects. If you see many different errors related to the POMs in the projects, check that you have an up to date installation. If you can't upgrade m2e, add the "spring" profile to your settings.xml. Alternatively you can copy the repository settings from the "spring" profile of the parent pom into your settings.xml.

[[importing-into-eclipse-without-m2eclipse]] === Importing into eclipse without m2eclipse If you prefer not to use m2eclipse you can generate eclipse project metadata using the following command:

[indent=0]

$ ./mvnw eclipse:eclipse

The generated eclipse projects can be imported by selecting import existing projects from the file menu.

[[contributing]] == Contributing

NOTE: Spring Cloud is released under the non-restrictive Apache 2.0 license. If you would like to contribute to this section of the documentation or if you find an error, please find the source code and issue trackers in the project at {github-project}[github].

[[license]] == License

The project license file is available https://raw.githubusercontent.com/spring-cloud/spring-cloud-openfeign/main/LICENSE.txt[here].